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4.4 Branch Instructions
No
Mnemonic
1
BZ/BEQ rel
2
BNZ/BNE rel
3
BC/BLO rel
4
BNC/BHS rel
5
BN rel
6
BP rel
7
BLT rel
8
BGE rel
9
BBC dir:b,rel
10
BBS dir:b,rel
11
JMP @A
12
JMP ext
13
CALLV #vct
14
CALL ext
15
XCHW A,PC
16
RET
17
RETI
INSTRUCTIONS
~
#
Operation
3
2
if Z=1 then PC←PC+rel
3
2
if Z=0 then PC←PC+rel
3
2
if C=1 then PC←PC+rel
3
2
if C=0 then PC←PC+rel
3
2
if N=1 then PC←PC+rel
3
2
if N=0 then PC←PC+rel
3
2
if V⊕N=1 then PC←PC+rel
3
2
if V⊕N=0 then PC←PC+rel
5
3
if (dir:b)=0 then PC←PC+rel
5
3
if (dir:b)=1 then PC←PC+rel
2
1
(PC)←(A)
3
3
(PC)←ext
6
1
vector call
6
3
subroutine call
3
1
(PC)←(A), (A)←(PC)+1
4
1
return from subroutine
6
1
return from interrupt
TL
TH
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
4– 6
OP Code
AH
N Z V C
-
- - - -
FD
-
- - - -
FC
-
- - - -
F9
-
- - - -
F8
-
- - - -
FB
-
- - - -
FA
-
- - - -
FF
-
- - - -
FE
-
- + - -
B0 to B7
-
- + - -
B8 to BF
-
- - - -
E0
-
- - - -
21
-
- - - -
E8 to EF
-
- - - -
31
dH
- - - -
F4
-
- - - -
20
-
restore
30
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